That's a possibility, but then the legs look a little bit too straight to me. You could also just put another 1x1 round between the pip and the brick, that doesn't look too bad either. The legs are about as long as the body and look okay to me, but if you think they should be longer, go for it.

The shoulders don't bother me either, if you want them to stick out less though, you can remove those small slopes and use 1x1 plates, or just leave it open. Most power armour I know has pretty big shoulders (like starcraft marines), and this suit is almost exactly twice as tall as a normal minifig, which is bigger than for instance the Starcraft marines, so...

The bottom line is that, even if you use this design, you should make adjustments as you see fit if you think that would be better. That's what everyone did with the prowler design, too.

not terribly pleasing aesthetically.. so I wouldn't mass produce them unless some slight changes on the design were made first. Namely, a different crotch-connection and less wide shoulders.

Then if you are looking at strategic value to CP cost ratios, it's usually not worth it to make hardsuits unless they can carry weapons that are bigger than what a normal fig could, so you might look into something of that nature as well.